I have a eurovox 8 , Its been fine for 4 months but suddenly i get no signal on most channels , The channels i get i get s picture its all blocky, I have cleared all channels , Reset to factory and power scanned and it finds all the channels but when it comes to view channels still the same, I have a second eurovox 8 and that is perfect in the same place , Any help would be gratefully appreciated , I have a null modem cable but the software will not reconize it is connected , Thats if i have the right sotware , Novice at this Thanks Again For Any help